Rotational Molding of Linear Low Density Polyethylene (LLDPE) Fumed Silica Nanocomposites

Chandran, V. Girish; Waigaonkar, Sachin

doi:10.3139/217.3264

Cited by 16 publications

(13 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Furthermore, rotomolding can more easily handle complex shapes with a very wide range of part sizes and variable thickness, as well as easy color changes [2, 3]. These features make rotomolding to be one of the fastest growing process of the plastic industry over the last few years [4, 5]. However, some disadvantages of this process are high operating temperatures and long cycle times [6–8].…”

Section: Introductionmentioning

confidence: 99%

Rotomolding of Foamed and Unfoamed GTR-LLDPE Blends: Mechanical, Morphological and Physical Properties

Dou¹,

Rodrigue

2018

Cellular Polymers

View full text Add to dashboard Cite

In this work, a simple method is presented to produce ground tire rubber (GTR) -linear low density polyethylene (LLDPE) compounds and foams via rotational molding. In particular, different GTR concentrations (0 to 50% wt.) were dry-blended with different chemical blowing agent (CBA) content (0 to 1% wt.). From the samples produced, a complete set of characterization was performed in terms of mechanical properties (tensile, flexural and impact), density and morphological properties. The results show that increasing GTR content or CBA content not only decreased both tensile and flexural moduli, but decreased ultimate strength and strain at break. As expected, increasing blowing agent content decreased density. Besides, with respect to impact strength, the value of all samples decreased with the addition of GTR or CBA except for 0.2% wt. CBA of GTR-LLDPE composite foams, which nearly remain at the same level.

show abstract

Section: Introductionmentioning

confidence: 99%

Rotomolding of Foamed and Unfoamed GTR-LLDPE Blends: Mechanical, Morphological and Physical Properties

Dou¹,

Rodrigue

2018

Cellular Polymers

View full text Add to dashboard Cite

show abstract

“…The superiority of the peak values obtained for both LLDPE and Glass fibre dust, was observed in the range of 15-35 percent, which was further investigated by Melt Flow Index (MFI) parameter to check the fluidity. According to the findings, 20 percent glass fibre dust concentrated with LLDPE had an optimum value of 3.16 grams/10 minutes, which is a reasonable index as needed for rotational molding processibility [2,4,23]. Shear modulus for 20 percent Glass Fibre dust added to LLDPE shows negligible significant variations, suggesting that a 20 percent LLDPE/GFD and less combination is acceptable from a rheological perspective.…”

Section: Preliminary Analysismentioning

confidence: 91%

“…Chandran et al investigated the internal air temperature, melt flow index and mechanical properties of Linear Low Density Polyethylene mixed with fumed silica for rotational molding process. They observed that 4% fumed silica proved to sustain the rotomoldability parameter while increasing the mechanical properties of the rotomolded product [23]. An E-glass fiber epoxy resin formation was prepared by Adekomaya et al using hand layup technique.…”

Section: Introductionmentioning

confidence: 99%

Effect of industrially processed glass fibre dust on mechanical, thermal and morphological properties mixed with LLDPE for rotational molding process

Gupta

Ramkumar

2021

Sādhanā

View full text Add to dashboard Cite

Rotational molding is an idiosyncratic plastic manufacturing technique that provides a comparatively stress free end product. The base resin extensively preferred for rotomolding is Linear Low Density Polyethylene (LLDPE). However, when compared to common engineering materials, pure LLDPE embarks poor mechanical properties targeting few critical applications. Usage of glass fibres as an additive is well known to the researchers in such criteria. But its industrially processed dust is yet to be investigated for rotational molding process. Thus, in the current context, rotationally molded LLDPE based products are investigated wherein glass fibres dust (GFD) are embedded into thermoplastic resin to examine the variation in strength and stiffness of end product. According to preliminary processing tests conducted, approximately 20% and below of LLPDE/GFD composites was observed to provide better fluidity as a prerequisite for rotomoldability. Hence, an experimental study was performed to benchmark the presence of 10%, 15%, 20% and 25% GFD when mixed with LLDPE for rotomolded product. When treating LLDPE/GFD at distinct weight ratio, the rate of heat transfer was also evaluated using the mold, oven, and internal air temperature. The composite's crystallinity was investigated using DSC analysis to assess the concentration of GFD incorporated in LLDPE. Scanning electron microscopy was furthermore utilized to display the underlying mechanisms of LLDPE/GFD ratios. The present work successfully signifies an increase in an overall performance due to the impact of GFD over unreinforced LLDPE. Therefore, it is hypothesized that till 20% GFD addition in the LLDPE matrix is expected to lead a rise in mechanical properties, thus potentially approaching towards retaining the requisite degree of design freedom of rotational molding process.

show abstract

Section: Introductionmentioning

confidence: 99%

“…The use of rotomolding for thermosetting materials was also observed, such as epoxy resins, 39 polyurethane, 40 phenolic resins, 41 and unsaturated polyester. 1,42 Inorganic fillers used in rotomolded material include wollastonite 43 and halloysite clay, 44 calcium carbonate, 45 graphite, 30,46,47 silica, [48][49][50][51] carbon nanotubes, 52 glass fibers, [52][53][54][55] and carbon. 52 The organic lignocellulosic fillers studied were cabuya (Andean sisal, Furcraea cabuya) 11 and sisal (Agave sisalana); 11,15 wood fiber; 12 flax; 15 oil palm empty fruit bunch; 56 agave (sisal species native to Central America, Agave tequilana); 13,14,57,58 pine wood; 59 coir, 59 maple wood; 60 banana and abaca´; 61 maple; 3,62 and hemp.…”

Section: Introductionmentioning

confidence: 99%

Rotomolding and polyethylene composites with rotomolded lignocellulosic materials: A review

León

Escócio

Visconte

et al. 2020

Journal of Reinforced Plastics and Composites

View full text Add to dashboard Cite

Rotomolding is a versatile process used in the manufacture of thermoplastic polymeric materials to produce large hollow plastic parts. The aim of this review article was to discuss the rotomolding process and show the properties of the polyethylene composite and rotomolded lignocellulosic fibers, which are processed for prolonged periods under temperature. The main process parameters studied are the shaft speed of the equipment, molding temperature, polymer particle size, polymer melt flow index, and amount of material, which must be well controlled to achieve a non-degraded product with homogeneous thickness and no porosity. Rotomolded composites containing sisal, pine, coir, banana, flax, and maple wood fibers, among others, have been evaluated primarily for their mechanical (impact, flexural, and tensile strength) and morphological properties. The type, content, and treatment of lignocellulosic fillers are the most widely studied variables in polyethylene-based rotomolded composites. Fiber content was the variable that most influenced mechanical properties, particularly impact strength and hardness due to the voids formed by the hydrodynamic volume between the polymer matrix and lignocellulosic filler. Chemical treatment of the fiber by mercerization with NaOH made it more hydrophobic and the addition of maleic anhydride-grafted polyethylene as a coupling agent improved the interfacial adhesion between the non-polar polymer matrix and polar filler. However, the best mechanical property results were obtained with the use of maleic anhydride-grafted polyethylene.

show abstract

Rotational Molding of Linear Low Density Polyethylene (LLDPE) Fumed Silica Nanocomposites

Cited by 16 publications

References 19 publications

Rotomolding of Foamed and Unfoamed GTR-LLDPE Blends: Mechanical, Morphological and Physical Properties

Rotomolding of Foamed and Unfoamed GTR-LLDPE Blends: Mechanical, Morphological and Physical Properties

Effect of industrially processed glass fibre dust on mechanical, thermal and morphological properties mixed with LLDPE for rotational molding process

Rotomolding and polyethylene composites with rotomolded lignocellulosic materials: A review

Contact Info

Product

Resources

About